円筒CFRPにおける動的破壊挙動の数値シミュレーション

摘要

In this study, dynamic and static failure tests for cylindrical CFRP are conducted, and their numerical simulations are performed. Commercial finite element method software ABAQUS is used in this study. For the numerical simulation, multi-scale analysis is carried out in this study. In the micro scale numerical simulation, a 2D periodic unit cell (PUC) analysis is conducted. The model can simulate matrix failure and fiber/matrix interface debonding by continuum damage mechanics (CDM) considering rate dependence and cohesive zone modeling (CZM), respectively. Conducting the micro scale simulation, rate-dependent failure criteria under multi-axial loadings for macro scale simulation are determined. The result of macro scale simulation is compared with the result of micro scale simulation.%炭素繊維強化プラスチック(CFRP)は，母材が樹脂，強化 材が炭素繊維の複合材料であり，優れた比強度•比剛性か ら，自動車産業への適用が見込まれている.このような用 途では，高い耐衝擊性を有することが望ましい.本研究では，炭素繊維とエポキシ樹脂からなる円筒状 CFRPについてスプリット•ホプキンソン棒(SHPB)法を用 いて動的破壊挙動を調べ，数値シミュレーションを行った. 試験片は，軸方向と，円周方向に補強された2種の円筒 CFRPを用いる.